According to one source/ego.globo
"Robert Pattinson, Kristen Stewart And Taylor Lautner land in Brazil next Friday, November 5, to begin testing the scenes of Breaking Dawn, says Brazil's largest newspaper Globo. The newspaper said the trio would return later this month to begin filming scenes. The neighborhood of Lapa will be used as the backdrop."

According to information from from lulacerda journalist , filming would take place in Rio on the 6th, and in Paraty on 7 and 8 of November. The journalist also claims that there is no official word on this though.

Google translation.
"We did our part. Make feasible the filming of Dawn in Rio P / bring investment, promote the city and give more realism to the film."

"We can't turn something positive into a negative. Having BD film here is better than not, right? So let's celebrate.

"About Dawn ... Safety standards have nothing to do with the fans. And it is normal w / a movie this size. Will be five days of intense work."

Added: No fan event, just filming.
"Q We want everything runs smoothly and on time. This is a film d, d not a promotional tour. The conditions are determined by producers" via gossip_dance

I think the journalist was not informed that the Isle Esme scenes are the honeymoon scenes and does not include Taylor's character. lol Please take note that nothing is definite about the dates, so this is labeled under rumored info.Thanks Nina. :)